Oil posted its first weekly loss in two months as traders weighed heightened geopolitical tensions over Ukraine against the potential for Iranian barrels to be added to the market. West Texas Intermediate closed down near $91 a barrel on Friday. U.S. crude fell 2.2% this week, fluctuating as prices of commodities from gas to metals and food swung with every twist and turn in the standoff between the West and Russia. The U.S. ramped up warnings of a possible Russian attack on Ukraine, Russian officials continued to reiterate that no invasion was underway and none was planned. U.S. Secretary of State Antony Blinken and Russia Foreign Minister Sergei Lavrov have agreed to meet for talks next week. Even with its most recent leg higher, oil’s recent rally has shown signs of cooling. The North Sea market has seen differentials for physical barrels ease, while refining margins have come under […]